Javascript判断浏览器版本和版本号，全兼容

var Tools = {
    BrowserInfo: function() {
        var Sys = {};
        var ua = navigator.userAgent.toLowerCase();
        var s;
        (s = ua.match(/msie ([\d.]+)/)) ? Sys.ie = s[1] :
        (s = ua.match(/firefox\/([\d.]+)/)) ? Sys.firefox = s[1] :
        (s = ua.match(/chrome\/([\d.]+)/)) ? Sys.chrome = s[1] :
        (s = ua.match(/opera.([\d.]+)/)) ? Sys.opera = s[1] :
        (s = ua.match(/version\/([\d.]+).*safari/)) ? Sys.safari = s[1] : 0;
        if (Sys.ie) return { Type: "ie", Ver: Sys.ie };
        if (Sys.firefox) return { Type: "ff", Ver: Sys.firefox };
        if (Sys.chrome) return { Type: "gc", Ver: Sys.chrome };
        if (Sys.opera) return { Type: "op", Ver: Sys.opera };
        if (Sys.safari) return { Type: "sf", Ver: Sys.safari };
        return { Type: "unknown", Ver: "unknown" };
    }
}
alert(Tools.BrowserInfo().Type);
alert(Tools.BrowserInfo().Ver);